Endoscopic full-thickness resection of rectal schwannoma: A case report

Figure 1 Colonoscopy and abdominopelvic computed tomography. A: White light endoscopy; B: Narrow band imaging; C: Endoscopic ultrasonography (a small probe at 20 Hz) showing a hypoechoic mass originating from the muscularis propria with clear boundary; D: A well-circumscribed, well-enhanced, round-shaped mass was identified at the rectum; the main growth pattern was extraluminal growth (yellow arrow).